Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Liveblog: Apple's FY2012 Q4 Earnings Call
Apple is set to announce earnings for the fourth fiscal quarter of 2012 on tonight starting at 10pm GMT ( 2:00pm Pacific Daylight Time). The earnings call is expected to be focused on the recently released iPhone 5 as well as the products shown off at Apple’s keynote on Tuesday including the new iPad mini , iPad 4 , iMac and the 13″; Retina Macbook Pro.
As the title suggests we are live blogging the call so be sure to check back at 2:00pm Pacific Daylight Time or 10pm GMT.